What is this? My friend bought it for me from Ozora festival and she even claimed to not know it’s correct function. Fits in hand easily as shown in pictures, has a small hole in the top and then the inside is hollow. Ceramic, I believe the mushroom design is purely design and don’t think it corresp

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Have tried blowing into it in case it was some kind of flute / ocarina. But nothing. Doesn’t really hold an incense stick well.